Polyoxometalates The research activity of the Kortz group is in the field of synthetic inorganic and organometallic chemistry. We are particularly interested in the preparation and structural characterization of discrete polynuclear metal-oxo complexes called polyoxometalates (POMs). POMs have a tremendous structural variety and interesting properties in different fields including catalysis, energy, environment, medicine and materials science. The multitude of potential applications has led to significant interest in POMs worldwide. The first POM was prepared almost two centuries ago by Berzelius (1826), but it could be structurally characterized only 100 years later by Keggin (1933). Especially the availability of single-crystal X-ray diffraction has led to the discovery of a large number of novel POMs with different shape, size, and composition.

The research activities of the Kortz group at Jacobs University Bremen are mainly focused on (a) transition metal-substituted POMs, (b) hybrid organic-inorganic POMs, and (c) noble metal-based POMs. POMs are synthesized and structurally characterized at Jacobs University Bremen using a multitude of state-of-the art solution and solid-state analytical techniques (e.g. NMR, XRD, IR, UV-vis, AA, TGA-DSC). The catalytic, magnetic, biomedical, and electrochemical properties of the novel compounds are also investigated, at times involving expert colleagues from around the world. The Kortz group also has several industrially sponsored research projects in the areas of catalysis, energy, and environmental applications.

In 2008 the Kortz group discovered polyoxopalladates(II), a class of POMs based exclusively on square-planar coordinated Pd2+ addenda (as opposed to classical POMs, which are based on early d-block metal ions in high oxidations states). In 2010 the Kortz group also discovered polyoxoaurates(III). In 2005 the Kortz group discovered Cu20P8W48, a pioneering result demonstrating chemical reactivity of the large, wheel-shaped P8W48.

Selected Publications

  1. Lanthanide-Containing 22-Tungsto-2-germanates [Ln(GeW11O39)2]13-: Synthesis, Structure, and Magnetic Properties
    Mougharbel, A. S.; Bhattacharya, S.; Bassil, B. S.; Rubab, A.; van Leusen, J.; Kögerler, P.; Wojciechowski, J.; Kortz, U. Inorg. Chem. 2020, [Read Online]
  2. Tetra-(p-tolyl)antimony(III)-containing Heteropolytungstates, [{(p-tolyl)SbIII}4(A-α-XW9O34)2]n- (X = P, As, Ge): Synthesis, Structure and Study of Antibacterial/Antitumor Activity
    Ma, T.; Yang, P.; Dammann, I.; Lin, Z.; Mougharbel, A. S.; Li, M.-X.; Adăscăliţei, F.; Mitea, R.; Silvestru, C.; Thorstenson, C.; Ullrich, M. S.; Cseh, K.; Jakupec, M. A.; Keppler, B. K.; Donalisio, M.; Cavalli, R.; Lembo, D.; Kortz, U. Inorg. Chem. 2020, [Read Online]
  3. 9-Cobalt(II)-Containing 27-Tungsto-3-Germanate(IV): Synthesis, Structure, Computational Modeling and Heterogeneous Water Oxidation Catalysis
    Haider, A.; Bassil, B. S.; Soriano-López, J.; Qasim, H. M.; de Pipaón, C. S.; Ibrahim, M.; Dutta, D.; Koo, Y.-S.; Carbó, J. J.; Poblet, J. M.; Galán-Mascarós, J. R.; Kortz, U. Inorg. Chem. 20195811308-11316. [Read Online]
  4. Peroxo-Cerium(IV)-Containing Polyoxometalates: [CeIV6(O2)9(GeW10O37)3]24-, a Recyclable Homogeneous Oxidation Catalyst
    Qasim, H. M.; Ayass, W. W.; Donfack, P.; Mougharbel, A. S.; Bhattacharya, S.; Nisar, T.; Balster, T.; Solé-Daura, A.; Römer, I.; Goura, J.; Materny, A.; Wagner, V.; Poblet, J. M.; Bassil, B. S.; Kortz, U. Inorg. Chem. 201958, 11300-11307. [Read Online]
  5. Fast Microwave-Assisted Synthesis of Wells-Dawson-Type 18-Tungsto-2-Phosphate [P2W18O62]6-
    Pandya, V. M.; Haider, A.; Qasim, H. M.; Mougharbel, A. S.; Kortz, U.; Joshi, S. A. Inorganics 20197, 23-28. [Read Online]
  6. Syntheses, and Crystal Structures of YIII Containing Di-metal Substituted 1,5 Isomer of Heterometallic Tungstophosphate Nanoclusters: [Y{PM2W10O38(H2O)2}2]11- (M = CoII and ZnII)
    Das, V.; Gupta, R.; Iseki, N.; Sadakane, M.; Mougharbel, A. S.; Kortz, U.; Hussain, F. ChemistrySelect 201942538-2544. [Read Online]
  7. Multi-Electron Redox Chemistry of Wells-Dawson Polyoxometalate Films onto Metallic and Dielectric Substrates
    Douvas, A. M.; Tsikrizis, D.; Tselios, C.; Kennou, S.; Haider, A.; Mougharbel, A. S.; Kortz, U.; Palilis, L. C.; Hiskia, A.; Coutsolelos, A. G.; Vasilopoulou, M.; Argitis, P. Phys. Chem. Chem. Phys. 201921, 427-437. [Read Online]
  8. Uniform Trend in Layer-by-Layer Deposition of Heteropolytungstates
    Ball, V.; Mougharbel, A. S.; Kortz, U. J. Colloid Interface Sci. 2019533, 771–778. [Read Online]
  9. [(SeO)4P8W48O184]32–: a Tetraselenite-Embedded Derivative of the Cyclic 48-Tungsto-8-Phosphate
    Wang, K.-Y.; Zhang, S.; Ding, D.; Ma, T.; Kortz, U.; Wang, C. Eur. J. Inorg. Chem. 2019, 512–516. [Read Online]
  10. Selective Rb+ vs K+ Guest Incorporation in Wheel-Shaped 27-Tungsto-3-Arsenate(III) Host, [M⊂{(β-AsIIIW8O30)(WO(H2O))}3]14- (M = K, Rb)
    Kandasamy, B.; Sudmeier, T.; Ayass, W. W.; Lin, Z.; Feng, Q.; Bassil, B. S.; Kortz, U. Eur. J. Inorg. Chem. 2019, 502-505.[Read Online]
  11. Bismuth(III)-Containing Heteropolytungstates, [Bi(XW11O39)2]n- (X = Si, Ge, n = 13; X = P, n = 11) and [Bi(P2W17O61)2]17-
    Ncube, N.; Bhattacharya, S.; Thiam, D.; Goura, J.; Mougharbel, A. S.; Kortz, U. Eur. J. Inorg. Chem. 2019, 363–366. [Read Online]
  12. Celebrating Polyoxometalate Chemistry
    Pope. M. T.; Sadakane. M.; Kortz. Ulrich. Eur. J. Inorg. Chem. 2019, 340–342. [Read Online]
  13. Special issue on Polyoxometalates
    Galán-Mascarós, J. R.; Kortz, U. Acta Crystallogr. 2018C74, 1180-1181. [Read Online]
  14. The Mixed-Valent 10-Manganese(III/IV)-Containing 36-Tungsto-4-Arsenate(V), [MnIII6MnIV4O4(OH)12(H2O)12(A-β-AsW9O34)4]22-
    Al-Oweini, R.; Bassil, B. S.; Itani, M.;Emiroğlu, D. B.; Kortz, U. Acta Crystallogr.  2018C74, 1390–1394. [Read Online]
  15. 15-Copper(II)-Containing 36-Tungsto-4-silicates(IV) [Cu15O2(OH)10X(A-α-SiW9O34)4]25- (X = Cl, Br): Synthesis, Structure, Magnetic Properties, and Electrocatalytic CO2 Reduction
    Bassil, B. S.; Haider, A.; Ibrahim, M.; Mougharbel, A. S.; Bhattacharya, S.; Christian, J. H.; Bindra, J. K.; Dalal, N. S.; Wang, M.; Zhang, G.; Keita, B.; Rutkowska, I. A.; Kulesza, P. J.; Kortz, U. Dalton Trans. 201847, 12439–12448. [Read Online]
  16. Preyssler-Pope-Jeannin Polyanions [NaP5W30O110]14- and [AgP5W30O110]14-: Microwave-Assisted Synthesis, Structure, and Biological Activity
    Haider, A.; Zarschler, K.; Joshi, S. A.; Smith, R. M.; Lin, Z.; Mougharbel, A. S.; Herzog, U.; Müller, C. E.; Stephan, H.; Kortz, U. Z. Anorg. Allg. Chem.  2018644, 752–758. [Read Online]
  17. Mechanism of Sodium Ion Storage in Na7[H2PV14O42] Anode for Sodium–Ion Batteries
    Lin, C.-C.; Lin, W.-H.; Huang, S.-C.; Hu, C.-W.; Chen, T.-Y.; Hsu, C.-T.; Yang, H.; Haider, A.; Lin, Z.; Kortz, U.; Stimming, U.; Chen, H.-Y. Adv. Mater. Interf. 20185, 1800491. [Read Online]
  18. Dithallium(III)-Containing 30-Tungsto-4-phosphate, [Tl2Na2(H2O)2(P2W15O56)2]16-: Synthesis, Structural Characterization, and Biological Studies
    Ayass, W. W.; Fodor, T.; Farkas, E.; Lin, Z.; Qasim, H. M.; Bhattacharya, S.; Mougharbel, A. S.; Abdallah, K.; Ullrich M. S.; Zaib, S.; Iqbal, J.; Harangi, S.; Szalontai, G.; Bányai, I.; Zékány, L.; Tóth, I.; Kortz, U. Inorg. Chem. 2018, (in press)
  19. Remember the Keggin Ion?
    Ayass, W. W.; Kortz, U. ChemViews Mag. 2018 []
  20. Reinvestigation of Dilacunary 19-Tungsto-2-Arsenate(III) [AsIII2W19O67(H2O)]14- Including 183W NMR Solution Study
    Wang, K.-Y.; Bassil, B. S.; Carey, A. M.; Mougharbel, A. S.; Kortz, U. Eur. J. Inorg. Chem. 2017, 4210–4213.[Read Online]
  21. Incorporation of Transition Metal Ion Guests (Co2+, Ni2+, Cu2+, Zn2+) into the Ti2-containing 18-Tungsto-2-Arsenate(III) Monolacunary Host
    Wang, K.-Y.; Bassil, B. S.; Xing, X.; Keita, B.; Bindra, J. K.; Diefenbach, K.; Dalal, N. S.; Kortz, U.  Eur. J. Inorg. Chem. 2016, 5519–5529. [Read Online]
    This paper has a video abstract [View video]
  22. Chiral Dodecanuclear Palladium(II)-Thio Cluster: Synthesis, Structure, and Formation Mechanism Explored by ESI-MS and DFT Calculations
    Lin, Z.; Fan, L.; Kondinski, A.; Vankova, N.; Heine, T.; Chen, B.; Haider, A.; Wang, B.; Kortz, U.; Hu, C. Inorg. Chem. 2016, 55, 7811−7813.[Read Online]
  23. Platinum-Containing Polyoxometalates: syn- and anti-[PtII2(α-PW11O39)2]10– and Formation of the Metal-Metal bonded di-PtIII Derivatives
    Lin, Z.; Izarova, N. V.; Kondinski, A.; Xing, X.; Haider, A.; Fan, L.; Vankova, N.; Heine, T.; Keita, B.; Cao, J.; Hu, C.; Kortz, U. Chem. Eur. J. 2016, 22, 5514-5519.[Read Online]
  24. Mixed-Valent Mn16-Containing Heteropolyanions: Oxidation State Tuning and Resulting Physicochemical Properties
    Haider, A.; Ibrahim, M.; Bassil, B. S.; Carey, A.M.; Nguyen Viet, A.; Xing, X.; Ayass, W. W.; Miñambres, J. F.; Liu, R.; Zhang, G.; Keita, B.; Mereacre, V.; Powell, A. K.; Balinski, K.; N’Diaye, A. T.; Kuepper, K.; Chen, H.-Y.; Stimming, U.; Kortz, U. Inorg. Chem. 2016, 55 , 2755-2764[Read Online]
  25. Characterization of PtIV-containing Polyoxometalates by High-Resolution Solid-State 195Pt and 51V NMR Spectroscopy
    Dugar, S.; Izarova, N. V.; Mal, S. S.; Fu, R.; Joo, H.-C.; Lee, U.; Dalal, N. S.; Pope, M. T.; Jameson, G. B.; Kortz, U. New J. Chem. 2016, 40, 923-927. [Read Online] 
  26. Polyoxometalates
    Pope, M. T.; Kortz, U. Encyclopedia of Inorganic and Bioinorganic Chemistry 2012. [Read Online]
  27. Recent Advances in Lanthanide-Containing Polyoxotungstates
    Bassil, B. S.; Kortz, U., Z. Anorg. Allg. Chem. 2010, 636, 2222-2231. [Read Online]

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